Perforated combustion tube oil burner



April 26, 1949, F. KOSZEWSKI PERFORATED COMBUSTION TUBE OIL BURNER- 2Sheets-Sheet 1 Filed Sept. 26, 1947 FRANK KOJ'ZEWJ/fl,

2 SheetsSheet 2 WM w w K W OJ M g/ )k m 2C: W M? F. KOSZEWSKI PERFORATEDCOMBUSTION TUBE OIL BURNER April 26, 1949.

Filed Sept. 26, 1947 Patented Apr. 26, 1949 LIMITED S'l'ATEd QEFICEPERFQRATED COMBUSTIUN TUBE OIL BURNER 1 Claim.

My invention relates to oil burners, and more specifically to oilburners oi the type in which fuel oil is preheated before ignition, forachieving better oil volatilization, and combustion efficiency.

A primary object of the invention is to provide an oil burner of theabove mentioned class which is extremely simple in design, strong anddurable, and readily disassembled for cleaning.

ther objects and advantages of the invention will be apparent durin thecourse of the following description.

In the accompanying drawings, forming a part of this application, and inwhich like numerals are employed to designate 'ke parts throughout thesame,

Figure 1 is a side elevation of the oil burner embodying the invention,parts broken away.

Figure 2 a horizontal section taken on line 2--2 of Figure 1.

Figure 3 is an enlarged fragmentary vertical section taken on line 3-3of Figure 2.

Figure 4 is a bottom plan view of the burner, parts in section.

In the drawings, where for the purpose of illustration is shown apreferred embodiment of the invention, the numeral designates a lowerhorizontal base casting or oil reservoir. This base casting I3 iscircular in plan, and includes a fiat circular bottom l 1, having acentral screw threaded opening 12. The base casting further includes anouter vertical annular wall I3, and upstanding air intake nozzles 14,preferably three in number. The nozzles it are spaced inwardly radiallyfrom the outer wall 13, and they are circularly curved and concentricwith the outer wall. The nozzles M are equidistantly spaced angularly,to provide vertical radial passages l5 between them. The concentricinner and outer sides It and ll of the nozzles preferably convergeslightly toward their tops, Figure 3, and the end walls 58 of thenozzles are preferably circularly curved. The tops of the nozzles M arehorizontal and flush with the top of the outer wall 13. The nozzles i lform arcuate air intake passages l9, which extend through the castingbottom H. The bottom H has a screw threaded opening 23 spaced radiallyoutwardly from the opening I 2, and between such opening and theadjacent nozzle 14. The opening receives the screw threaded upper end ofan oil feed line or pipe 2!. The base casting H3 is supported upon avertical support or pipe 22, the upper screw threaded portion 23 ofwhich enters the screw threaded opening I2 of the casting. The screwthreaded portion 23 projects upwardly from the bottom II, but terminatesbelow the top of the outer wall l3.

Mounted upon the top of the pipe 22, and having a central screw threadedopening 24!, to receive the portion. 23, is an inner horizontal circularcasting or burner plate 25. This burner plate comprises circular bottom26, smaller in diameter than the inside diameter of the outer wall l3,and forming therewith a vertical annular The outside diameter of thebottom is concentric with the wall 13. The burner plate furthercomprises a center thickened portion upon which is mounted an upstandingannular wall or 29. Spaced concentrically outwardly from the annularwall 29, and formed upon and integral with the bottom 25 are upstandingwalls or flanges 3Q 3!. The concentric walls and 3! form an annularspace 32 between them. Formed in the bottom 26, between the walls 3@ and3!, are circularly curved slots 33, to receive the upper portions of theconverging sides iii and ll of the nozzles I l. The slots 33 snuglyengage the outsides of the nozzles, in assembly. The pipe portion 23 isscrewed into the opening 23 of the burner plate, until the slots 33engage upon the converging sides It and IT, to limit the downwardmovement of the burner plate, and form a seat for the same. The bottom25 is continuous between the ends of the slots 33, to provide a unitaryburner plate structure. The top edge of the outer wall i3 is flush withthe top edges of the annular flanges 29, 30, and 3|, in assembly, Figure3. Formed in the bottom 26 near the ends of the slots 33, and spacedradially inwardly therefrom, are oil feed openings or holes 34.

Disposed upon the thickened portion 28 of the burner plate, and fittinclose to the inside surface of the annular flange 29 is an upstandingannular perforated sleeve 35, projecting above the burner plate 25 for asubstantial distance. Arranged between the annular flanges 3!] and 3|,and the adjacent sides l6 and H of the nozzles M, are similar perforatedannular sleeves 36 and 3?, projecting above the burner plate for thesame distance as the sleeve 35. An outer perforated annular sleeve 33,is provided with an annular bead 39, and mounted upon the outer Wall l3of the base casting Hi. This sleeve 38 projects slightly above the topsof the sleeves 35, 36, and 3i, and may be provided with a shortconically tapered top portion 413, Figure 1. The perforated sleeves 35,36 and 37 and 38 are preferably formed of suitable heat resisting sheetmetal.

Disposed in the annular space between the flanges 29 and 30 is anupstanding annular wick 4!, preferably formed of a suitable absorbentnoncombustible material. The wick 4| is disposed 3 directly over theholes 34 in the bottom 26. A similar annular wick 42, of larger diameteris disposed upon the bottom 26, outwardly of the wall 3| This wick maybe of the same height as the wick 4|, Figure 1.

In use, fuel oil is fed upwardly through the line 21, and enters thebase casting l0. A substantial oil reservoir is available between thebottom 26 of the burner plate, and the bottom of the casting II). Thisreservoir is filled with oil, and such oil is preheated by its proximityto the burner plate 25, above which combustion takes place. The oillevel may rise slightly above the bottom 26 of the burner plate, andsuch oil goes through the annular passage 21, and the holes 34-inthebottom 26. The oil above the burner. plate bottom 26 is thus evenly andthoroughly distributed thereon in a thin layer, which will readilyvolatilize and burn. The wicks 4| and42 absorb oil, and these Wicks areused to start the combustion.

Airenters the burner through the nozzles l4, and central pipe 22, to aidthe combustion. The arcuate nozzles l4 insure'an even distribution andflow of air.

The concentric perforated sleeves 35, 36, 31 and 38' form inner andouter annular combustion spaces A and B, with an annular air-flow space0 between them. The perforations in the concentric sleeves allow passageof the incomin air from the pipe 22 and nozzles l4 into the combustionspaces A and B.

The above described burner has beenfound to efifect efficientcombustion, and facilitates the preheating of the oil in the reservoirbelow the burner plate, as stated. The burner may be convenientlydisassembled for cleaning.

It is to be understood that the form of my invention herewith shownv anddescribed is to be taken'as a preferred. example of the same, and thatvarious changes in the shape, size and arrangement of parts may beresorted to, without departing from the spirit of the invention, or thescope of the claim.

Having thus described my invention, I claim:

An oil burner, comprising a substantially horizontal base casting, suchbase casting includin an annular outer wall and upstanding circularlycurved air intake nozzles spaced inwardly from the outer wall andforming a substantially annular series of air intake passages, asubstantially horizontal circular burner plate disposed above the basecasting and inside of the outer wall and concentric therewith andforming with the outer wall an annular fuel passage, said burner platealso forming with said base casting a lower fuel reservoir wherein fuelis preheated, said burner plate being provided with a plurality of fuelfeed openings, such openings being arranged inwardly of said nozzles,the burner plate having circularly curved slots to receive the nozzlesand to snugly engage upon the same and including upstanding concentricannular walls arranged upon opposite sides of the nozzles and near thesame and an inner annular wa1l,;up standing perforated concentricsleeves mounted upon the burner plate and disposed between the sides ofthe nozzles and the concentric sleeves; an annular perforated sleevemounted upon the burner plate and having its lower end disposedf againstthe inner annular Wall, a outer'annulari perforated sleeve mounted uponthe base casting and extending above the same and-concentric with thementioned sleeves, and upstanding annular wicks mounted upon the burnerplate and disposed between some of .said sleeves.

FRANK KOSZEWSKI.

REFERENCES CITED The following references are of record inhthei file ofthis patent:

UNITED STATES PATENTS Number Name Date;

1,986,526 Pickup- Jan. 1, 1935 2,032,332 Sherman Feb. 25, 1936.2,047,303 Albree July 14,1936 2,144,052 Covoni Jan. 17,1939;

